factory-prisma

Create factories, that create objects with Prisma.

Inspired by Python's factory_boy, which is inspired by Ruby's factory_bot.

Usage

Install factory-prisma as a dev dependency, then use it to define factories for your Prisma models.

import db from 'wherever/your/prisma/client/is'
import { factory, random } from 'factory-prisma'

export const TeamFactory = factory(db.team, () => ({
  name: random.string(),  // use faker if you want to
  key: random.string(),
  type: TeamType.CLUB,
  website: random.url(),
}));

export const SquadFactory = factory(db.squad, () => ({
  team: { create: TeamFactory.fields() },
  type: SquadType.SENIOR_MEN,
}));

export const PlayerFactory = factory(db.player, () => ({
  key: random.string(),
  name: random.string(),
  dob: random.date(),
  position: PlayerPosition.CM,
}));

Then, use the factories in your tests:

test("no relations", async () => {
    await TeamFactory.instance();

    expect(await db.team.count()).toBe(1);
});

test("with relations", async () => {
    await SquadFactory.instance();
    
    const team = await db.team.findFirstOrThrow();
    const squad = await db.squad.findFirstOrThrow();
    
    expect(await db.team.count()).toBe(1);
    expect(await db.squad.count()).toBe(1);
    expect(team.id).toBe(squad.teamId);
});

test("connect", async () => {
    const { id } = await TeamFactory.instance();
    await SquadFactory.instance({ team: { connect: { id } } });
    
    const team = await db.team.findFirstOrThrow();
    const squad = await db.squad.findFirstOrThrow();
    
    expect(await db.team.count()).toBe(1);
    expect(await db.squad.count()).toBe(1);
    expect(team.id).toBe(squad.teamId);
});